package com.coolwen.filter;

import com.coolwen.entity.User;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
 * Created by user on 2016-12-9.
 */
public class LoginFilter implements Filter {
    @Override
    public void destroy() {

    }

    @Override
    public void doFilter(ServletRequest req, ServletResponse resp,
                         FilterChain chain) throws IOException, ServletException {
        HttpServletRequest hsq = (HttpServletRequest) req;
        User u = (User) hsq.getSession().getAttribute("loginUser");
        if (u == null) {
            ((HttpServletResponse) resp).sendRedirect(hsq.getContextPath() + "/user/login-page");
        }
        chain.doFilter(req, resp);
    }

    @Override
    public void init(FilterConfig arg0) throws ServletException {

    }

}
